Scoophead running tool

Abstract

A scoophead/diverter system is run into a wellbore using a novel scoophead running tool. The running tool allows circulation through its inside diameter, and has internal pressure integrity to test any seals below the running tool prior to releasing the scoophead. This also allows circulation while running in order to apply MWD techniques. This run-in tool includes a mounting head from which extends a running stump and a housing (or connecting mandrel) parallel to the running stump. The running stump and housing are sized and configured to be respectively received in large and small diameter bores in the scoophead. The scoophead running tool thus allows torque to be transmitted about the centerline of the scoophead assembly in spite of being attached into one of the offset bore. This torque transmission is accomplished by connecting the connecting mandrel between the running tool and scoophead at the same offset as the large bore of the scoophead. This transfer of torque is important in order to reliably manipulate the scoophead assembly with the running string. The connecting mandrel of the running tool has an internal bypass sleeve that opens at a predetermined pressure that allows a tripping ball to be circulated down to its seat if the scoophead is to run and be anchored into a closed system.

What is claimed is: 
     
       1. A running tool comprising: a mounting head having an opening passing longitudinally therethrough, said mounting head having a first end and an opposed second end;   a running stump extending outwardly from said second end; and   a housing extending outwardly from said first end and communicating with said opening through said mounting head, said housing being parallel to said running stump, said housing and running stump being axially offset with respect to the longitudinal axis of said mounting head;   an internal mandrel in said housing having an outer surface and an interior longitudinal opening, said internal mandrel being longitudinally movable within said housing in response to a selected force; and   displaceable connecting means cooperating with said housing and internal mandrel to selectively engage or disengage from mating connecting means in another downhole device in response to the movement of said internal mandrel.   
     
     
       2. The tool of claim 1 wherein said mounting head further includes: an axial upper neck portion at said first end;   a lower head portion having a larger diameter than said neck portion, said lower head portion terminating at said second end; and   a skirt connecting said neck and lower head portions.   
     
     
       3. The tool of claim 2 including: a fluid bypass opening through said lower head portion between said skirt and said second end, said fluid bypass opening communicating with the interior of said running stump.   
     
     
       4. The tool of claim 1 wherein: said running stump is removably bolted to said mounting head; and   said housing is threadably attached to said mounting head.   
     
     
       5. The tool of claim 1 including: second shear means connecting said internal mandrel to said housing, said second shear means shearing at a selected shear force to permit longitudinal movement of said internal mandrel with respect to said housing.   
     
     
       6. The tool of claim 1 including: bypass sleeve means supported along a portion of the interior of said internal mandrel, said bypass sleeve means being normally attached to said internal mandrel at a first position and being adapted to slidably move along said internal mandrel a selected distance to then engage said internal mandrel at a second position.   
     
     
       7. The tool of claim 6 wherein: said bypass sleeve means normally attaches to said internal mandrel using first shear means.   
     
     
       8. The tool of claim 7 including: a bearing surface on the upper end of said bypass sleeve means for supporting a ball to create a "closed" system downstream of said bearing surface.   
     
     
       9. The tool of claim 6 including: fluid bypass port means through said bypass sleeve means, said internal mandrel and said housing to permit passage of fluid from downstream of said sleeve means when said sleeve means is in said second position.   
     
     
       10. The tool of claim 8 including: second shear means connecting said internal mandrel to said housing, said second shear means shearing at a selected shear force to permit longitudinal movement of said internal mandrel with respect to said housing.   
     
     
       11. The tool of claim 10 wherein: said first shear means comprises a shear ring; and   said second shear means comprises at least one shear screw.   
     
     
       12. The tool of claim 10 wherein: said ball is adapted to urge said bypass sleeve means downwardly whereby said bypass sleeve means then moves said internal mandrel from a first position to a second position if said bypass sleeve means exerts a force great enough to shear said second shear means.   
     
     
       13. The tool of claim 6 wherein said sleeve means terminates at a cylindrical section and wherein said cylindrical section engages said internal mandrel at a shoulder along said internal mandrel. 
     
     
       14. The tool of claim 1 wherein said displaceable connecting means comprises: at least one window through said housing;   a dog in said window, said dog being supported by said internal mandrel; and   a raised surface on said outer surface of said internal mandrel and an associated recessed surface on said outer surface of said internal mandrel wherein as said internal mandrel longitudinally moves, said dog is urged outwardly of said window when said dog is supported by said raised surface and is urged inwardly of said window when said dog is supported by said recessed surface.   
     
     
       15. The tool of claim 6 wherein said displaceable connecting means comprises: at least one window through said housing;   a dog in said window, said dog being supported by said internal mandrel; and   a raised surface on said outer surface of said internal mandrel and an associated recessed surface on said outer surface of said internal mandrel wherein as said internal mandrel longitudinally moves, said dog is urged outwardly of said window when said dog is supported by said raised surface and is urged inwardly of said window when said dog is supported by said recessed surface.